Note 20 - Major Funded and Unfunded Defined Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Change in Benefit Obligation
Special termination benefits	$ 3	$ 3
U.S. [Member]
Change in Plan Assets
Over (under) funded status at end of period	231	135
Non-US [Member]
Change in Plan Assets
Over (under) funded status at end of period	(216)	(173)
Defined Benefit Plans [Member] | U.S. [Member]
Change in Benefit Obligation
Projected benefit obligation at beginning of period	3,475	3,405
Service cost	11	10
Interest cost	86	122
Benefit payments	(277)	(349)
Actuarial loss	299	284
Settlements	(121)
Special termination benefits	3	3
Projected benefit obligation at end of period	3,476	3,475
Change in Plan Assets
Fair value of plan assets at beginning of period	3,610	3,445
Gain on plan assets	495	514
Benefit payments	(277)	(349)
Settlements	(121)
Fair value of plan assets at end of period	3,707	3,610
Over (under) funded status at end of period	231	135
Accumulated benefit obligation at end of period	3,473	3,474
Defined Benefit Plans [Member] | Non-US [Member]
Change in Benefit Obligation
Projected benefit obligation at beginning of period	834	834
Service cost	3	3
Interest cost	9	13
Benefit payments	(47)	(48)
Actuarial loss	39	36
Currency adjustments	74	(4)
Projected benefit obligation at end of period	912	834
Change in Plan Assets
Fair value of plan assets at beginning of period	661	671
Gain on plan assets	20	28
Employer contributions	7	10
Benefit payments	(47)	(48)
Currency adjustments	55
Fair value of plan assets at end of period	696	661
Over (under) funded status at end of period	(216)	(173)
Accumulated benefit obligation at end of period	$ 903	$ 825